/* * Industry-pack bus. * * (C) 2011 Samuel Iglesias Gonsalvez , CERN * (C) 2012 Samuel Iglesias Gonsalvez , Igalia * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; version 2 of the License. */ #include #include #include #include "ipack_ids.h" #define IPACK_IDPROM_OFFSET_I 0x01 #define IPACK_IDPROM_OFFSET_P 0x03 #define IPACK_IDPROM_OFFSET_A 0x05 #define IPACK_IDPROM_OFFSET_C 0x07 #define IPACK_IDPROM_OFFSET_MANUFACTURER_ID 0x09 #define IPACK_IDPROM_OFFSET_MODEL 0x0B #define IPACK_IDPROM_OFFSET_REVISION 0x0D #define IPACK_IDPROM_OFFSET_RESERVED 0x0F #define IPACK_IDPROM_OFFSET_DRIVER_ID_L 0x11 #define IPACK_IDPROM_OFFSET_DRIVER_ID_H 0x13 #define IPACK_IDPROM_OFFSET_NUM_BYTES 0x15 #define IPACK_IDPROM_OFFSET_CRC 0x17 struct ipack_bus_ops; struct ipack_driver; enum ipack_space { IPACK_IO_SPACE = 0, IPACK_ID_SPACE = 1, IPACK_MEM_SPACE = 2, IPACK_INT_SPACE, }; /** * struct ipack_addr_space - Virtual address space mapped for a specified type. * * @address: virtual address * @size: size of the mapped space */ struct ipack_addr_space { void __iomem *address; unsigned int size; }; /** * struct ipack_device * * @bus_nr: IP bus number where the device is plugged * @slot: Slot where the device is plugged in the carrier board * @bus: ipack_bus_device where the device is plugged to. * @id_space: Virtual address to ID space. * @io_space: Virtual address to IO space. * @mem_space: Virtual address to MEM space. * @dev: device in kernel representation. * * Warning: Direct access to mapped memory is possible but the endianness * is not the same with PCI carrier or VME carrier. The endianness is managed * by the carrier board throught bus->ops. */ struct ipack_device { unsigned int bus_nr; unsigned int slot; struct ipack_bus_device *bus; struct ipack_addr_space id_space; struct ipack_addr_space io_space; struct ipack_addr_space int_space; struct ipack_addr_space mem_space; struct device dev; u8 *id; size_t id_avail; u32 id_vendor; u32 id_device; u8 id_format; unsigned int id_crc_correct:1; unsigned int speed_8mhz:1; unsigned int speed_32mhz:1; }; /** * struct ipack_driver_ops -- callbacks to mezzanine driver for installing/removing one device * * @probe: Probe function * @remove: tell the driver that the carrier board wants to remove one device */ struct ipack_driver_ops { int (*probe) (struct ipack_device *dev); void (*remove) (struct ipack_device *dev); }; /** * struct ipack_driver -- Specific data to each ipack board driver * * @driver: Device driver kernel representation * @ops: Mezzanine driver operations specific for the ipack bus. */ struct ipack_driver { struct device_driver driver; const struct ipack_device_id *id_table; const struct ipack_driver_ops *ops; }; /** * struct ipack_bus_ops - available operations on a bridge module * * @map_space: map IP address space * @unmap_space: unmap IP address space * @request_irq: request IRQ * @free_irq: free IRQ * @get_clockrate: Returns the clockrate the carrier is currently * communicating with the device at. * @set_clockrate: Sets the clock-rate for carrier / module communication. * Should return -EINVAL if the requested speed is not supported. * @get_error: Returns the error state for the slot the device is attached * to. * @get_timeout: Returns 1 if the communication with the device has * previously timed out. * @reset_timeout: Resets the state returned by get_timeout. */ struct ipack_bus_ops { int (*map_space) (struct ipack_device *dev, unsigned int memory_size, int space); int (*unmap_space) (struct ipack_device *dev, int space); int (*request_irq) (struct ipack_device *dev, irqreturn_t (*handler)(void *), void *arg); int (*free_irq) (struct ipack_device *dev); int (*get_clockrate) (struct ipack_device *dev); int (*set_clockrate) (struct ipack_device *dev, int mherz); int (*get_error) (struct ipack_device *dev); int (*get_timeout) (struct ipack_device *dev); int (*reset_timeout) (struct ipack_device *dev); }; /** * struct ipack_bus_device * * @dev: pointer to carrier device * @slots: number of slots available * @bus_nr: ipack bus number * @ops: bus operations for the mezzanine drivers */ struct ipack_bus_device { struct device *parent; int slots; int bus_nr; const struct ipack_bus_ops *ops; }; /** * ipack_bus_register -- register a new ipack bus * * @parent: pointer to the parent device, if any. * @slots: number of slots available in the bus device. * @ops: bus operations for the mezzanine drivers. * * The carrier board device should call this function to register itself as * available bus device in ipack. */ struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots, const struct ipack_bus_ops *ops); /** * ipack_bus_unregister -- unregister an ipack bus */ int ipack_bus_unregister(struct ipack_bus_device *bus); /** * ipack_driver_register -- Register a new driver * * Called by a ipack driver to register itself as a driver * that can manage ipack devices. */ int ipack_driver_register(struct ipack_driver *edrv, struct module *owner, const char *name); void ipack_driver_unregister(struct ipack_driver *edrv); /** * ipack_device_register -- register a new mezzanine device * * @bus: ipack bus device it is plugged to. * @slot: slot position in the bus device. * * Register a new ipack device (mezzanine device). The call is done by * the carrier device driver. */ struct ipack_device *ipack_device_register(struct ipack_bus_device *bus, int slot); void ipack_device_unregister(struct ipack_device *dev); /** * DEFINE_IPACK_DEVICE_TABLE - macro used to describe a IndustryPack table * @_table: device table name * * This macro is used to create a struct ipack_device_id array (a device table) * in a generic manner. */ #define DEFINE_IPACK_DEVICE_TABLE(_table) \ const struct ipack_device_id _table[] __devinitconst /** * IPACK_DEVICE - macro used to describe a specific IndustryPack device * @_format: the format version (currently either 1 or 2, 8 bit value) * @vend: the 8 or 24 bit IndustryPack Vendor ID * @dev: the 8 or 16 bit IndustryPack Device ID * * This macro is used to create a struct ipack_device_id that matches a specific * device. */ #define IPACK_DEVICE(_format, vend, dev) \ .format = (_format), \ .vendor = (vend), \ .device = (dev)